How about this one? UP 613 switcher. These are gray and yellow. ONE photo (from the rear) almost looks like a gray top, the rest, blue. Yet, what appears to be the white numbers on the front above the radiator look right.
Back cab mount pretty mangled, window struts gone, all 4 edges of the cab roof dinged up, somebodies cat ate one of the stacks off.....even a poor candidate for a repaint. Shipping exceeds value. Sell the chassis separately, right?
Anyway maybe it's the monitor on this old Toshiba making it blue. What color do you see on the top?
Below are photos of the real thing from Lionel.
https://www.ebay.com/itm/LIONEL-613-UNI ... 3577902512



